Microbiology Compend- True or False Flashcards
Pneumococci are encapsulated when existing in vegetative form.
True
Lobar pneumonia may be prevented by vaccination with killed cultures of the organisms that cause the disease.
False
Gonococci can live for long periods of time outside the body of the host.
False
Skin abscesses are infections caused by Staphylococcus aureus.
True
The organisms responsible for tularemia may enter the body through the broken or unbroken skin.
True
Tetanus is an infection that may be transmitted by droplet spray.
False
The disease epidemic meningitis is caused by a member of the same genus as the causative agent for the disease gonorrhea.
True
Most people are carriers of the disease lobar pneumonia at some time during the year.
True
Gonorrhea is an example of an infection that may be either acute or chronic.
True
Scarlet fever and rheumatic fever are caused by the same organism.
True
Infections caused by Salmonella enteritidis may be be transmitted by either direct or indirect contact.
False
The etiological agents for the disease tuberculosis are capable of forming endospores.
False
The disease anthrax is caused by a spore-forming bacillus.
True
Gonorrhea and ophthalmia neonatorum are diseases caused by the same organism.
True
Asiatic cholera is a disease caused by an organism named Vibrio cholerae.
True
Myobacterium tuberculosis are encapsulated bacteria.
False
Naturally acquired active immunity is established by having had a case of the disease.
True
Bacteria and their products are the only substances that stimulate the body cells of the host to produce antibodies.
False
A foreign protein which, when introduced into the body excites the body to produce antibodies, is called an immune serum.
False
All vaccines are antigenic.
True
Active immunity resulting from the transmission of antibodies through the placenta is a form of natural immunity.
True
The control of enteric infections depends primarily on the prevention of contamination of food and water.
True
Active immunization to tetanus can be produced by the inoculation of an immune serum.
False
Puncture wounds are in danger of producing gas gangrene because they provide anaerobic conditions and dead tissue for the growth of the organisms that cause the infection.
True
Tetanus and gas gangrene are considered to be non-communicable infections.
True
Botulism is a form of food intoxication.
True
Clostridium perfringens produces a powerful exotoxin.
True
The most common type of plague is the pneumonic variety.
False
Syphilis may be transmitted through the placenta to the unborn child.
True
Gonorrhea may be transmitted through the placenta to the unborn child.
False
Direct contact is the most common mode of transmission for enteric infections.
False
Staphylococcus aureus is the most common causative agent for boils.
True
The organism causing tuberculosis may live in dried sputum for a considerable length of time.
True
Any foreign protein can act as an antigen in the host.
True
An antiserum is a blood serum that contains antigens.
False
Passive immunization is used as a prophylactic measure in regard to a specific infection.
True
Antibacterial serums neutralize exotoxins.
False
Agglutinins are specific types of antibodies.
True
Precipitins are a specific type of antigen.
False
Precipitins are specific types of antibodies.
True
Naturally acquired passive immunity is established by actually having had the disease for which the immunity is specific.
False
Naturally acquired active immunity is established by actually having had the disease for which the immunity is specific.
True
Young infants show a passive immunity to such diseases as measles, chickenpox, and diphtheria due to a transfer of immune bodies from the blood of the mother to the unborn child through the placenta.
True
Toxoids are used for the treatment of infectious diseases.
False
A highly developed state of resistance to a specific disease is called virulence.
False
Lack of resistance to a specific disease is called susceptibility.
True
Puerperal fever is an infection that occurs only in females.
True
Scarlet fever may be transmitted by contaminated milk.
True
A case of any infectious disease produces an immunity to that disease.
False
All cases of pneumonia are caused by Streptococcus pneumoniae.
False
Gonorrhea may be prevented by the injection of a vaccine for the disease.
False
Susceptibility is the reverse of immunity.
True
The “Humoral Immunity Theory” involves the formation of antibodies in the blood.
True
Agglutinins are antibodies that cause organisms to adhere to each other and form clumps.
True
The immunity resulting from the use of antibodies is more permanent than that resulting from the use of vaccines.
False
A vaccine establishes passive immunity.
False
An antitoxin establishes passive immunity.
True
Antibacterial serums neutralize exotoxins.
False
An antibody is a substance which when introduced into the body causes the body to produce antigens.
False
An antigen is a substance which when introduced into the body causes the body to produce antibodies.
True
The important phagocytic cells contained in the blood are leucocytes, particularly the neutrophils.
True
Opsonins are substances in the blood that dissolve bacteria.
False
An antiserum serves as a means of defense against a disease if it contains antibodies specific for that disease.
True
Coagulases are chemical substances produced by pathogenic agents which prevent blood from clotting.
False
Allergy is the natural or spontaneous form of hypersensitivity.
True
Normal human blood contains agglutinins.
True
The autoclave utilizes steam under pressure.
True
Antibodies which act on bacteria or other foreign substances in such a manner as to render them more easily ingested by phagocytes are called opsonins.
True
Scarlet fever may be transmitted by mosquitos.
False
The genus Staphylococcus contains both pathogenic and non-pathogenic species.
True
All members of the genus Neisseria are pathogenic to humans.
False
Some streptococci are capable of forming endospores.
False
Streptococcus pyogenes may be the causative agent for scarlet fever, rheumatic fever, gonorrhea, and puerperal fever.
False
The disease diphtheria may be prevented by producing an artificially acquired active immunity to the disease.
True
Tuberculosis may be transmitted by contaminated fomites.
True
All members of the genus Clostridium are capable of forming endospores.
True
Gonorrhea may be transmitted by contaminated fomites.
False
Influenza is caused by a bacillus.
False
Epidemic typhus is spread from person to person by the body louse.
True
Rocky Mountain Spotted Fever is caused by a rickettsia.
True
The viruses causing acute infections of the respiratory tract are known as dermatropic viruses.
False
Viruses whose characteristic lesions appear on the skin are known as penumotropic viruses.
False
Rabies is caused by a neurotropic virus.
True
Varicella is another name for smallpox.
False (Chickenpox)
Smallpox, if still a threat to man, could be transmitted from person to person by droplet infection.
True
Rubella is another name for smallpox.
False
It is believed that the virus of rubeola enters the body by the mouth and nose.
True
German measles is known as rubeola.
False
Variola is another name for smallpox.
True
Common colds may be transmitted by droplet spray.
True